package com.cn.lf.wx.dacs.bussiness.author.common;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * 普通的MD加密
 * @author peaceliu
 *
 */
public class Md5 {

    public static String md5(String plainText) {
        byte[] secretBytes = null;
        try {
            secretBytes = MessageDigest.getInstance("md5").digest(plainText.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("没有md5这个算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制数字
        // 如果生成数字未满32位，需要前面补0
        for (int i = 0; i < 32 - md5code.length(); i++) {
            md5code += "0";
        }
        return md5code;
    }
    public static void main(String[] args) {
    	String x="dsadsa";
    	System.out.println(x.charAt(4));
        System.out.println(md5("123456"));
    }
}